welcome to the world of, some do it right, many do not.
my new home by Pulte hired what i thought was a good sub. while doing a tile backsplash in my kitchen i heard a little "bzzz,,,, bzzzz,,,, bzz", i ear'd it down, was coming from an outlet. i thought maybe it got damaged from use but then realized its an outlet that rarely gets used, so then i thought it might be a bad piece of hardware..... turns out the idiot person who put them in didnt tighten the screws tight, on every outlet in the kitchen!! rubber gloves, line screw driver, i tightened every one of them. i have yet to check the whole house but i suspect there are more....
but then you think, whats the root cause of problem like this? its that to work and live in the US means you need to do more work faster because the GC wont pay more per job, etc, thus the quality of work suffers. i say pay up you GC folks, pay more to get a better product !!
i just had a plumbing quote for ~16ft of 1" gas line, steel epoxy stuff in ground, a few turns, union, ball valve. "sir, that will be $898"..... i almost said "eighty-nine dollars and eighty cents?". wholly crap, $898 for 16ft and about 2hr worth of time, they didnt even need to trench as i had already done all that. i know they need to make $$ and $898 was likely a fair price i guess, but way to much for me. now i own a portable electric threading tool and saved myself $678 !